Question 1

Energy harvested by plants from sunlight allows for the storage of glucose in their cells. When plants do this, their _____ increases.

Accepted Answer

The energy harvested from sunlight by plants is converted into chemical energy in the form of glucose which is stored in their cells. Since chemical energy is a form of potential energy, the answer is A) potential energy.

Question 2

Which example undergoes continued testing and refinement so that we know more about how something happens in nature?

Accepted Answer

The answer of Which example undergoes continued testing and refinement...

Question 3

Which example has the MOST kinetic energy?

Accepted Answer

An airplane flying over Texas has the most kinetic energy because kinetic energy depends on both the mass and the velocity of an object. Among the options given, an airplane has a significantly higher mass and velocity compared to the other examples, resulting in the highest kinetic energy.

Question 4

A patient arrives at a doctor's office complaining of head congestion and lethargy. The nurse thinks the patient may have a sinus infection. The nurse is making a _____ concerning her patient's condition.

Accepted Answer

The nurse is making a hypothesis, a tentative explanation for the patient's symptoms based on her observations and knowledge. A theory is a well-established explanation that has been tested and supported by evidence. A scientific law describes a consistent pattern observed in nature. A postulate is a basic assumption or principle that is not necessarily proven but is used as a foundation for further reasoning.

Question 5

Which statement is NOT accurate?

Accepted Answer

Theories do not necessarily become scientific laws. Scientific laws are based on repeatable observations and describe a phenomenon, while theories explain why or how a phenomenon occurs. Some theories may become widely accepted and supported by a significant amount of evidence, but they may not necessarily become a scientific law.

Question 6

After testing and refining ideas, scientists often develop a model that explains why things behave as they do and predicts what will happen in the future. This type of model is BEST referred to as a:

Accepted Answer

A model that explains why things behave as they do and predicts what will happen in the future is best referred to as a theory. A hypothesis is an initial explanation or prediction, while a scientific law describes a behavior or phenomenon that is always observed under certain conditions. Postulate is an assumption made without proof for the sake of reasoning.

Question 7

Liquid gasoline is heated and becomes gasoline vapor. The gasoline vapor is then ignited by a spark, causing a fire. The entire process is:

Accepted Answer

The first step, heating liquid gasoline, is an endothermic process as it requires energy to break the intermolecular forces holding the molecules together. The second step, the ignition of gasoline vapor, is an exothermic process as energy is released in the form of heat and light. Therefore, the entire process is first an endothermic change followed by an exothermic process.

Question 8

A highly reactive chemical compound reacts with another compound and produces products that are more stable than the initial reactants. During this chemical reaction, heat was released. According to this information, this reaction was:

Accepted Answer

The release of heat indicates that energy was released from the system, making it exothermic.

Question 9

Which process is endothermic?

Accepted Answer

Heating water to convert it into steam is an endothermic process, as it requires energy to be absorbed from the surroundings. In contrast, burning wood in a fireplace, burning gasoline in a combustion engine, and digesting food are all exothermic processes, as they release energy into the surroundings.

Question 10

Which example BEST describes something moving to a higher energy state?

Accepted Answer

The answer of Which example BEST describes something moving to...

Quiz 1: Foundations